3
7
8
1
4
6
1
8
2
5
9
4
3
1
4
1
6
6
5
2
3
7
9
This Sudoku Puzzle has 65 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, Empty Rectangle techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 8 / Column 8 → 6 (Hidden Single)
- Row 4 / Column 4 → 1 (Hidden Single)
- Row 9 / Column 5 → 1 (Hidden Single)
- Row 7 / Column 8 → 1 (Hidden Single)
- Row 2 / Column 9 → 6 (Hidden Single)
- Row 1 / Column 8 → 4 (Hidden Single)
- Row 9 / Column 9 → 4 (Hidden Single)
- Row 8 / Column 1 → 5 (Hidden Single)
- Row 3 / Column 2 → 1 (Hidden Single)
- Row 5 / Column 1 → 1 (Hidden Single)
- Row 3 / Column 9 → 3 (Hidden Single)
- Row 9 / Column 7 → 5 (Hidden Single)
- Row 8 / Column 2 → 2 (Hidden Single)
- Row 2 / Column 2 → 9 (Naked Single)
- Row 8 / Column 6 → 9 (Hidden Single)
- Row 8 / Column 5 → 8 (Naked Single)
- Row 8 / Column 4 → 4 (Full House)
- Row 1 / Column 4 → 8 (Hidden Single)
- Row 9 / Column 1 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 7 in b3 => r56c7<>7
- Locked Candidates Type 1 (Pointing): 7 in b7 => r56c3<>7
- Locked Candidates Type 2 (Claiming): 7 in r5 => r4c56,r6c456<>7
- Row 3 / Column 4 → 7 (Hidden Single)
- Row 1 / Column 7 → 7 (Hidden Single)
- Naked Pair: 2,8 in r57c9 => r1c9<>2, r4c9<>8
- Naked Triple: 4,5,6 in r135c3 => r6c3<>4, r6c3<>6
- Empty Rectangle: 2 in b2 (r26c8) => r6c5<>2
- Naked Triple: 3,5,6 in r46c5,r6c4 => r46c6<>3, r5c5<>6
- Row 4 / Column 6 → 8 (Naked Single)
- Row 4 / Column 2 → 7 (Naked Single)
- Row 6 / Column 2 → 8 (Full House)
- Row 4 / Column 8 → 5 (Naked Single)
- Row 2 / Column 8 → 2 (Naked Single)
- Row 6 / Column 8 → 7 (Full House)
- Row 4 / Column 9 → 9 (Naked Single)
- Row 2 / Column 6 → 3 (Naked Single)
- Row 2 / Column 4 → 5 (Full House)
- Row 6 / Column 4 → 3 (Full House)
- Row 3 / Column 7 → 9 (Naked Single)
- Row 1 / Column 9 → 5 (Full House)
- Row 9 / Column 6 → 7 (Naked Single)
- Row 7 / Column 5 → 3 (Full House)
- Row 9 / Column 3 → 3 (Full House)
- Row 4 / Column 5 → 6 (Naked Single)
- Row 4 / Column 1 → 3 (Full House)
- Row 6 / Column 3 → 9 (Naked Single)
- Row 3 / Column 5 → 2 (Naked Single)
- Row 1 / Column 5 → 9 (Full House)
- Row 1 / Column 3 → 6 (Naked Single)
- Row 1 / Column 1 → 2 (Full House)
- Row 7 / Column 1 → 9 (Naked Single)
- Row 7 / Column 3 → 7 (Full House)
- Row 6 / Column 5 → 5 (Naked Single)
- Row 5 / Column 5 → 7 (Full House)
- Row 3 / Column 1 → 4 (Naked Single)
- Row 3 / Column 3 → 5 (Full House)
- Row 5 / Column 3 → 4 (Full House)
- Row 6 / Column 1 → 6 (Full House)
- Row 5 / Column 6 → 2 (Naked Single)
- Row 6 / Column 6 → 4 (Full House)
- Row 6 / Column 7 → 2 (Full House)
- Row 5 / Column 9 → 8 (Naked Single)
- Row 5 / Column 7 → 6 (Full House)
- Row 7 / Column 7 → 8 (Full House)
- Row 7 / Column 9 → 2 (Full House)
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